Bernard Repetti

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Synthesis of nanometric platelet-like Ni(OH)2 particles is described. The role of several experimental parameters on the particle size is investigated. A colloidal dispersion of particles is produced by adsorbing ionizable organic ligands (trisodium citrate) on the particle surface. The stability of this colloidal dispersion and the particle charge density(More)
In this paper, we propose an approach combining both strata detection and grain analysis on images of indurated cores. We use high-resolution images (47 lm/pixel) for granulometry and low-resolution images (270 lm/pixel) for strata detection, stored in indexed database. The quality of these images is sufficient for an interpretation identical and even(More)
Digital signal processing is commonly used in Geophysics. Methods combining core sample physical property measurements with image analysis are beginning to emerge. In this paper, we describe a digital processing method applied directly to core sample images. Our approach uses a number of timefrequency and scale-frequency transformations as well as(More)
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